Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Joseph S Maciejko, PH.D.

Psychologist in Davenport, IA · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1922096791

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Registry record

Entity type Individual (Type 1)

Name Joseph S Maciejko

Credential PH.D.

Sex Male

Practice address 4455 E 56th St, Davenport, IA, 52807

Phone (563) 355-2577

Fax (563) 355-4015

Enumeration date Oct 6, 2005

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 00085 (IA) Primary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 00240 (IA) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers Secondary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
42652	Other	IA	WELLMARK HEALTH PLAN
1083568	Medicaid	IA	-
IA0195	Other	-	JOHN DEERE HEALTH PLAN

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Joseph Maciejko?

Joseph Maciejko is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.